Insulation performance of permittivity graded FGM (functionally graded materials) in SF/sub 6/ gas under lightning impulse conditions

Author

Okubo, Hitoshi ; Shumiya, Hideki ; Ito, Masahiro ; Kato, Katsumi

Author_Institution

Nagoya Univ.

fYear

2006

fDate

11-14 June 2006

Firstpage

332

Lastpage

335

Abstract

For the size reduction of electric power apparatus, the electric field stress around solid insulators is increasing and carefully to be considered. This concern may be solved by the application of FGM (functionally graded materials). In this paper, we investigated the insulation performance of FGM insulator, from both experimental approach and numerical simulation. Firstly, we fabricated column and truncated cone spacers having the permittivity distributed characteristics. Secondly, we investigated the breakdown in SF₆ gas under lightning impulse conditions with theoretical discussion. Finally, we could verify the insulation performance of FGM, and confirmed the significant effect of FGM application for gas/solid composite insulation system

Keywords

SF₆ insulation; composite insulators; lightning; numerical analysis; permittivity; FGM; SF₆; electric power apparatus; functionally graded material; gas breakdown; gas-solid composite insulation system; lightning impulse condition; numerical simulation; permittivity; solid insulator; truncated cone spacer; Dielectrics and electrical insulation; Electric breakdown; Electrodes; Gas insulation; Lightning; Partial discharges; Permittivity; Solids; Stress; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation, 2006. Conference Record of the 2006 IEEE International Symposium on

Conference_Location

Toronto, Ont.

ISSN

1089-084X

Print_ISBN

1-4244-0333-2

Type

conf

DOI

10.1109/ELINSL.2006.1665325

Filename

1665325